202: Electrical science

What is the formula for Ohms law

Voltage= Current x resistance (V=I R)

What is the formula for power

Power= Current x Voltage (P=I x V)

What 4 factors determine the resistivity

Length of conductor, temperature, the cross sectional area, Type of conducting material

How does changing the length of a conductor affect its resistance?

Resistance increases as length increases

How does changing the cross sectional area affect a conductors resistance?

Resistance decreases as cross sectional area increases

How do you find the total resistance

RT=R1+R2+R3 (Add them all together)

Why do different materials conduct electricity differently

different materials have a different number off electrons in their structure

What is the formula for force?

Mass x Newtons

What is the formula for Torque

Force x distance

What is the formula for work done

Force x distance

What is the Si unit for energy

Joules

What is the formula for Joules

Watts x seconds

What is the SI unit for Joules

Newton Metre